320222321 has 4 divisors (see below), whose sum is σ = 331264500. Its totient is φ = 309180144.

The previous prime is 320222297. The next prime is 320222339. The reversal of 320222321 is 123222023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 227677921 + 92544400 = 15089^2 + 9620^2 .

It is a cyclic number.

It is not a de Polignac number, because 320222321 - 2¹⁴ = 320205937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320222321.

It is not an unprimeable number, because it can be changed into a prime (320222921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5521046 + ... + 5521103.

It is an arithmetic number, because the mean of its divisors is an integer number (82816125).

Almost surely, 2^320222321 is an apocalyptic number.

It is an amenable number.

320222321 is a deficient number, since it is larger than the sum of its proper divisors (11042179).

320222321 is a wasteful number, since it uses less digits than its factorization.

320222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042178.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 320222321 is about 17894.7568019239. The cubic root of 320222321 is about 684.1487434859.

Adding to 320222321 its reverse (123222023), we get a palindrome (443444344).

It can be divided in two parts, 32022 and 2321, that added together give a palindrome (34343).

The spelling of 320222321 in words is "three hundred twenty million, two hundred twenty-two thousand, three hundred twenty-one".